Top Banana Bike

Step 2 Pull stem from kid bike and make a new tall seat support tube instead

Take stem from kid bike and measure tubing diameter needed to replace the stem and slip snugly into the fork's steering tube.

Slip it into steerer and determine length needed to get eat to right height for you.
Cut to length remembering to subtract height of caster frame that goes between tube and seat nose bracket.

Shave dowel down to fit snugly in top of stem tube. Pound it in at least 5 inches. Cut off protruding excess dowel. Drill snug whole to let you force thread the caster bolt into the dowel.

Attach stem tube to bike either slipping it directly in fork's steerer tube or using an intermediate tube in the steerer and slipping the stem over the intermediate tube. fit with aluminum can strip shims if needed for snugness.

Comments

[Woodenbikes]

This "Seat Support Tube" fits in the fork's steerer tube (I welded it in there instead of using an expansion bolt) just like the stem would on a normal bike. So the Seat Support Tube is conceptually a modified overgrown handlebar stem that now holds the handlebars (by holding their stem) and supports the nose of the seat.

[mooseface97]

I know your pretty spacific but I don't quite understand. Does the tube go inside the same spot the fork is or does it get welded to the top.